FOP-2538: PDF to PDF OOM

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1713641 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/fop/apps/FOUserAgent.java

@@ -39,6 +39,7 @@ import org.apache.xmlgraphics.image.loader.ImageContext;
 import org.apache.xmlgraphics.image.loader.ImageManager;
 import org.apache.xmlgraphics.image.loader.ImageSessionContext;
 import org.apache.xmlgraphics.image.loader.impl.AbstractImageSessionContext;
+import org.apache.xmlgraphics.image.loader.util.SoftMapCache;
 import org.apache.xmlgraphics.util.UnitConv;
 
 import org.apache.fop.Version;
@@ -804,4 +805,8 @@ public class FOUserAgent {
     public Map<String, String> getHyphenationPatternNames() {
         return factory.getHyphenationPatternNames();
     }
+
+    public SoftMapCache getPDFObjectCache() {
+        return factory.getPDFObjectCache();
+    }
 }

src/java/org/apache/fop/apps/FopFactory.java

@@ -37,6 +37,7 @@ import org.apache.commons.logging.LogFactory;
 import org.apache.xmlgraphics.image.loader.ImageContext;
 import org.apache.xmlgraphics.image.loader.ImageManager;
 import org.apache.xmlgraphics.image.loader.impl.AbstractImageSessionContext.FallbackResolver;
+import org.apache.xmlgraphics.image.loader.util.SoftMapCache;
 import org.apache.xmlgraphics.util.UnitConv;
 
 import org.apache.fop.apps.io.InternalResourceResolver;
@@ -82,6 +83,8 @@ public final class FopFactory implements ImageContext {
 
     private final ColorSpaceCache colorSpaceCache;
 
+    private final SoftMapCache pdfObjectCache = new SoftMapCache(true);
+
     private final FopFactoryConfig config;
 
     private final InternalResourceResolver resolver;
@@ -433,4 +436,8 @@ public final class FopFactory implements ImageContext {
     public ColorSpaceCache getColorSpaceCache() {
         return this.colorSpaceCache;
     }
+
+    public SoftMapCache getPDFObjectCache() {
+        return pdfObjectCache;
+    }
 }